io_uring: move req_ref_get() and friends

Move all request refcount helpers to avoid forward declarations in the
future.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/89fd36f6f3fe5b733dfe4546c24725eee40df605.1628705069.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

fs/io_uring.c

@@ -1078,6 +1078,41 @@ EXPORT_SYMBOL(io_uring_get_socket);
 #define io_for_each_link(pos, head) \
 	for (pos = (head); pos; pos = pos->link)
 
+/*
+ * Shamelessly stolen from the mm implementation of page reference checking,
+ * see commit f958d7b528b1 for details.
+ */
+#define req_ref_zero_or_close_to_overflow(req)	\
+	((unsigned int) atomic_read(&(req->refs)) + 127u <= 127u)
+
+static inline bool req_ref_inc_not_zero(struct io_kiocb *req)
+{
+	return atomic_inc_not_zero(&req->refs);
+}
+
+static inline bool req_ref_sub_and_test(struct io_kiocb *req, int refs)
+{
+	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));
+	return atomic_sub_and_test(refs, &req->refs);
+}
+
+static inline bool req_ref_put_and_test(struct io_kiocb *req)
+{
+	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));
+	return atomic_dec_and_test(&req->refs);
+}
+
+static inline void req_ref_put(struct io_kiocb *req)
+{
+	WARN_ON_ONCE(req_ref_put_and_test(req));
+}
+
+static inline void req_ref_get(struct io_kiocb *req)
+{
+	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));
+	atomic_inc(&req->refs);
+}
+
 static inline void io_req_set_rsrc_node(struct io_kiocb *req)
 {
 	struct io_ring_ctx *ctx = req->ctx;
@@ -1539,41 +1574,6 @@ static bool io_cqring_overflow_flush(struct io_ring_ctx *ctx)
 	return ret;
 }
 
-/*
- * Shamelessly stolen from the mm implementation of page reference checking,
- * see commit f958d7b528b1 for details.
- */
-#define req_ref_zero_or_close_to_overflow(req)	\
-	((unsigned int) atomic_read(&(req->refs)) + 127u <= 127u)
-
-static inline bool req_ref_inc_not_zero(struct io_kiocb *req)
-{
-	return atomic_inc_not_zero(&req->refs);
-}
-
-static inline bool req_ref_sub_and_test(struct io_kiocb *req, int refs)
-{
-	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));
-	return atomic_sub_and_test(refs, &req->refs);
-}
-
-static inline bool req_ref_put_and_test(struct io_kiocb *req)
-{
-	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));
-	return atomic_dec_and_test(&req->refs);
-}
-
-static inline void req_ref_put(struct io_kiocb *req)
-{
-	WARN_ON_ONCE(req_ref_put_and_test(req));
-}
-
-static inline void req_ref_get(struct io_kiocb *req)
-{
-	WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));
-	atomic_inc(&req->refs);
-}
-
 /* must to be called somewhat shortly after putting a request */
 static inline void io_put_task(struct task_struct *task, int nr)
 {